My Solutions to Exam 1

[BubbleWrapMan]

Not to be a party pooper but weren't you supposed to express the real root as 3 + i0?

[DJing]

I doubt it. 3+0i is technically 'unsimplified' anyway and real numbers and imaginary numbers alone still come under the Cartesian way of writing complex, so 3 should be fine

Pretty sure they had a+ib mostly to make sure z2 wasn't left in 2cis(-2pi/3)

[BubbleWrapMan]

They still asked for it so I dunno

But yes it would be dog for them to take marks off so I guess they wouldn't

[Truck]

lol i noticed that and I wrote 3 + 0i... I think the only way they'd take marks off for it is if the A+ cut off is really high, but I don't think it will be so whatever.

[WhoTookMyUsername]

Would they give a consequential for getting 5aii) wrong (inclusive insteAd of exclusive) but finding the intersection of part i and ii correctly in iii?

[BubbleWrapMan]

I'm sure you would

[sodapop]

If I get 32/40 for this exam, have good SACs (maybe top 15 in a strong cohort), would I still have a chance at 40+?

[Deleted User]

If I get 32/40 for this exam, have good SACs (maybe top 15 in a strong cohort), would I still have a chance at 40+?

I have the same dilemma! I'm aiming for a 40 raw but I'm pretty sure the highest mark I would've gotten for exam 1 is 34/40. I'm also decently ranked in a strong cohort.

[baddin]

yes you do have to find cos(x)=0

:S Can someone please explain why it was necessary to find cos(x)=0?

Edit: Don't worry, just got it. I'm such an idiot; I cross-multiplied then cancelled the cos(x). How many marks do you think I would've lost?

For the equation 2cos(x) = sqrt(2)cos(x)/sin(x) to be true.
Either cos(x) = 0     or sin(x) =  sqrt(3)/(2)
therefore for cos(x) = 0, x = pi/2 + 2kpi and x = 3pi/2 + 2kpi, where k E z, z = 0,1,2,3...
And for sin(x) = sqrt(3)/(2), x = pi/3 + 2kpi and x = 2pi/3 + 2kpi, where k E z, z = 0,1,2,3....

[WhoTookMyUsername]

I'm sure you would

Ugh hopefully they're nice :/
Also for the vector question, finding the angle between r(0) and the one they gave, if i found the angle between the velocity vector and that, would i get 0/2?

[BubbleWrapMan]

*I'm sure they would

Um you'd get 1 at most.

[WhoTookMyUsername]

I'd be happy with one for that question.
Not sure what i was thinking, did it the same way as other first time around, didn't get a nice number, thought might be asking for instantaenous change (a thought that occured to me during reading time)...
A top  kid at my school said he was 'one hunderd percent sure' it was pi/3 but i guess we were wrong.
Absolute best case,
Didn't make the arithmetic error (+ or -) final solution for implicit diff, that i may have
Their nice for some reason and give me (1/2) for vector
Their nice and give me conseq for second domain question,

In which case i get 38.
But most likely is 36 and possibly 35 in which case i really need to full mark the next exam

[Deleted User]

I'd be happy with one for that question.
Not sure what i was thinking, did it the same way as other first time around, didn't get a nice number, thought might be asking for instantaenous change (a thought that occured to me during reading time)...
A top  kid at my school said he was 'one hunderd percent sure' it was pi/3 but i guess we were wrong.
Absolute best case,
Didn't make the arithmetic error (+ or -) final solution for implicit diff, that i may have
Their nice for some reason and give me (1/2) for vector
Their nice and give me conseq for second domain question,

In which case i get 38.
But most likely is 36 and possibly 35 in which case i really need to full mark the next exam

What raw score are you aiming for?

[WhoTookMyUsername]

Heh, was aiming for 47... But no chance of that.
Would be extremely happy with 44, happy with 43, okay with 42

[Deleted User]

Heh, was aiming for 47... But no chance of that.
Would be extremely happy with 44, happy with 43, okay with 42

So you think it's still possible to get 40 raw if you only get 34-35/40 for exam 1 (what I probably got)?